linux-kernel - [PATCH 41/44] x86: pmc_atom: Register poweroff handler with kernel poweroff handler

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Date:	Mon,  6 Oct 2014 22:28:43 -0700
From:	Guenter Roeck <linux@...ck-us.net>
To:	linux-kernel@...r.kernel.org
Cc:	adi-buildroot-devel@...ts.sourceforge.net,
	devel@...verdev.osuosl.org, devicetree@...r.kernel.org,
	lguest@...ts.ozlabs.org, linux-acpi@...r.kernel.org,
	linux-alpha@...r.kernel.org, linux-am33-list@...hat.com,
	linux-cris-kernel@...s.com, linux-efi@...r.kernel.org,
	linux-hexagon@...r.kernel.org, linux-m32r-ja@...linux-m32r.org,
	linuxppc-dev@...ts.ozlabs.org, linux-s390@...r.kernel.org,
	linux-tegra@...r.kernel.org, linux-xtensa@...ux-xtensa.org,
	openipmi-developer@...ts.sourceforge.net,
	user-mode-linux-devel@...ts.sourceforge.net,
	linux-arm-kernel@...ts.infradead.org, linux-c6x-dev@...ux-c6x.org,
	linux-ia64@...r.kernel.org, linux-m68k@...ts.linux-m68k.org,
	linux-metag@...r.kernel.org, linux-mips@...ux-mips.org,
	linux-parisc@...r.kernel.org, linux-pm@...r.kernel.org,
	linux-sh@...r.kernel.org, xen-devel@...ts.xenproject.org,
	Guenter Roeck <linux@...ck-us.net>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: [PATCH 41/44] x86: pmc_atom: Register poweroff handler with kernel poweroff handler

Register with kernel poweroff handler instead of setting pm_power_off
directly. Register with a low priority value of 64 to reflect that
the original code only sets pm_power_off if it was not already set.

Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: H. Peter Anvin <hpa@...or.com>
Signed-off-by: Guenter Roeck <linux@...ck-us.net>
---
 arch/x86/kernel/pmc_atom.c | 20 +++++++++++++++++---
 1 file changed, 17 insertions(+), 3 deletions(-)

diff --git a/arch/x86/kernel/pmc_atom.c b/arch/x86/kernel/pmc_atom.c
index 0c424a6..79331a2 100644
--- a/arch/x86/kernel/pmc_atom.c
+++ b/arch/x86/kernel/pmc_atom.c
@@ -20,6 +20,8 @@
 #include <linux/pci.h>
 #include <linux/device.h>
 #include <linux/debugfs.h>
+#include <linux/notifier.h>
+#include <linux/pm.h>
 #include <linux/seq_file.h>
 #include <linux/io.h>
 
@@ -92,7 +94,8 @@ static inline void pmc_reg_write(struct pmc_dev *pmc, int reg_offset, u32 val)
 	writel(val, pmc->regmap + reg_offset);
 }
 
-static void pmc_power_off(void)
+static int pmc_power_off(struct notifier_block *this, unsigned long unused1,
+			 void *unused2)
 {
 	u16	pm1_cnt_port;
 	u32	pm1_cnt_value;
@@ -107,8 +110,15 @@ static void pmc_power_off(void)
 	pm1_cnt_value |= SLEEP_ENABLE;
 
 	outl(pm1_cnt_value, pm1_cnt_port);
+
+	return NOTIFY_DONE;
 }
 
+static struct notifier_block pmc_poweroff_nb = {
+	.notifier_call = pmc_power_off,
+	.priority = 64,
+};
+
 static void pmc_hw_reg_setup(struct pmc_dev *pmc)
 {
 	/*
@@ -247,8 +257,12 @@ static int pmc_setup_dev(struct pci_dev *pdev)
 	acpi_base_addr &= ACPI_BASE_ADDR_MASK;
 
 	/* Install power off function */
-	if (acpi_base_addr != 0 && pm_power_off == NULL)
-		pm_power_off = pmc_power_off;
+	if (acpi_base_addr != 0) {
+		ret = register_poweroff_handler(&pmc_poweroff_nb);
+		if (ret)
+			dev_err(&pdev->dev,
+				"Failed to install poweroff handler\n");
+	}
 
 	pci_read_config_dword(pdev, PMC_BASE_ADDR_OFFSET, &pmc->base_addr);
 	pmc->base_addr &= PMC_BASE_ADDR_MASK;
-- 
1.9.1

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/